It's a good reliable and cheap program. I just think that professionals will stick to what they know which is all the old favs. I think they can work with Reaper if they are fast or smart or new enough but most older users will stick with the features they spent years of detective work to make the established DAWs work well. And they can also afford the more expensive lines.
I would and do always recommend it to anyone new or looking for good cheap software even having reservations about the midi which seems to function well on a simple level for me at least.
Pologies if I barked up the wrong tree there but I can see both sides of the debate.
I just like a good barney with cheeky buggers...
Success is round the corner. It's also round the bend.